<!DOCTYPE html>
<meta charset="UTF-8">
<style>
.parent {
  --percentage-list: 30% 300%;
}
.target {
  --percentage-list: 10% 100%;
}
</style>
<body>
<script src="../interpolation/resources/interpolation-test.js"></script>
<script>
CSS.registerProperty({
  name: '--percentage-list',
  syntax: '<percentage>+',
  initialValue: '40% 400%',
  inherits: false,
});

assertInterpolation({
  property: '--percentage-list',
  from: 'initial',
  to: '20% 200%',
}, [
  {at: -0.3, is: '46% 460%'},
  {at: 0, is: '40% 400%'},
  {at: 0.5, is: '30% 300%'},
  {at: 1, is: '20% 200%'},
  {at: 1.5, is: '10% 100%'},
]);

assertInterpolation({
  property: '--percentage-list',
  from: 'inherit',
  to: '20% 200%',
}, [
  {at: -0.3, is: '33% 330%'},
  {at: 0, is: '30% 300%'},
  {at: 0.5, is: '25% 250%'},
  {at: 1, is: '20% 200%'},
  {at: 1.5, is: '15% 150%'},
]);

assertInterpolation({
  property: '--percentage-list',
  from: 'unset',
  to: '20% 200%',
}, [
  {at: -0.3, is: '46% 460%'},
  {at: 0, is: '40% 400%'},
  {at: 0.5, is: '30% 300%'},
  {at: 1, is: '20% 200%'},
  {at: 1.5, is: '10% 100%'},
]);

assertInterpolation({
  property: '--percentage-list',
  from: '-10% -100%',
  to: '10% 100%',
}, [
  {at: -0.3, is: '-16% -160%'},
  {at: 0, is: '-10% -100%'},
  {at: 0.5, is: '0% 0%'},
  {at: 1, is: '10% 100%'},
  {at: 1.5, is: '20% 200%'}
]); 

assertInterpolation({
  property: '--percentage-list',
  from: '10%',
  to: '100%',
}, [
  {at: -0.3, is: '-17%'},
  {at: 0, is: '10%'},
  {at: 0.5, is: '55%'},
  {at: 1, is: '100%'},
  {at: 1.5, is: '145%'}
]);

assertInterpolation({
  property: '--percentage-list',
  from: neutralKeyframe,
  to: '20% 200%',
}, [
  {at: -0.3, is: '7% 70%'},
  {at: 0, is: '10% 100%'},
  {at: 0.5, is: '15% 150%'},
  {at: 1, is: '20% 200%'},
  {at: 1.5, is: '25% 250%'},
]);

assertComposition({
  property: '--percentage-list',
  underlying: '50% 60%',
  addFrom: '10% 140%',
  addTo: '110% 40%',
}, [
  {at: -0.3, is: '30% 230%'},
  {at: 0, is: '60% 200%'},
  {at: 0.5, is: '110% 150%'},
  {at: 1, is: '160% 100%'},
  {at: 1.5, is: '210% 50%'},
]);

assertComposition({
  property: '--percentage-list',
  underlying: '50% 60%',
  addFrom: '10% 140%',
  replaceTo: '110% 40%',
}, [
  {at: -0.3, is: '45% 248%'},
  {at: 0, is: '60% 200%'},
  {at: 0.5, is: '85% 120%'},
  {at: 1, is: '110% 40%'},
  {at: 1.5, is: '135% -40%'},
]);

</script>
</body>
